What is the concentration of arsenic in ppb

Assignment Help Chemistry
Reference no: EM13849181

A 45-g serving of a white rice contains 9.0 µg of inorganic arsenic.  What is the concentration of arsenic in ppb?   _____________

How many digits should this number contain?  _____________     If you didn't already do this, write the answer in scientific notation to show the correct number of digits.  ______________

Reference no: EM13849181

Previous Q& A

  Assuming the tank is sitting in water at 298 k

Consider a scuba tank (12.0 L volume) initially at 1.00 atm that is subsequently filled to 200atm with oxygen (average M ~ 32.00 g/mol, Cp! = 29.355 j.mol^-1k^-1) behaving as an ideal gas. Assuming the tank is sitting in water at 298 K at an external..

  Why is method misleading to the stakeholders

Shifting Future Expenses to the Current Period as a Special Charge A company might choose to accelerate discretionary expenses, such as repairs and maintenance, into the current period if the current year’s revenue is relatively high in relation to e..

  The isothermal compressibility of diamond

The isothermal compressibility of diamond is 0.187 x 10-6 atm-1. (a) Express this value in Pa-1. (b) A cube of diamond 10 cm on each side at 25 °C is to be inserted in the keel of an underwater exploration TV camera, and its designers needed to know ..

  Evaluate and explain the value of a job description

For your current job or a previous job, evaluate and explain the value of a job description from the perspectives listed below. An employee performing a selected job

  What was the firm''s net profit after tax

Firm XYZ has operating profits of $90,000, taxes of $15,000, interest expense of $30,000, and preferred stock dividends of $5,000. What was the firm's net profit after tax?

  Saltpeter is a compound made of potassium (

Saltpeter is a compound made of potassium (K), nitrogen (N), and oxygen (O). Every 100.00 g of saltpeter contains 38.67 g potassium and 13.86 g nitrogen. What is the mass of oxygen contained in 316.0mg of saltpeter?

  How much new long-term debt financing will be needed

At year-end 2015, Wallace Landscaping’s total assets were $1.9 million and its accounts payable were $390,000. Sales, which in 2015 were $2.1 million, are expected to increase by 20% in 2016. How much new long-term debt financing will be needed in 20..

  Hydrogen gas and nitrogen gas react to form ammonia

When hydrogen gas and nitrogen gas react to form ammonia, the enthalpy change is recorded as 45.92 kJ per mole of ammonia formed. How many moles of hydrogen gas and nitrogen gas are needed in order to produce 15.31kJ of energy

  Has the inflation rate in the increased or decreased

Has the inflation rate in the US increased or decreased in the past 5 years? Why? Have interest rates increased or decreased over that same period? Why? What can we likely expect of both in the near future?

  Find the percent by mass of oxygen

Find the percent by mass of oxygen in heptanoic acid, C6H13CO2H.

Reviews

Write a Review

 

Similar Q& A

  Determine the concentration of total dissolved solids

The sample is placed in a drying dish (weight = 0.5000 g before the sample is added), and then placed in an oven at 104°C until all the moisture is evaporated

  Explain nitrogen and oxygen form an extensive series

Nitrogen and oxygen form an extensive series of at least seven oxides with the general formula NxOy. One of them is a blue solid that comes apart, reversibly, in the gas phase. It contains 36.84% N. What is the empirical formula of the oxide

  What time will it take for the reaction

At 25 degree celcius ,the second order reaction NOCL(g) - NO (g) + 1/2 CL2 (g) is 50 % complete after 5.82 hours when the initial concentration of Nitrosyl chloride is 4.46 ml/L.what time will it take for the reaction to be 75 % complete.

  Evaluate the molar mass of the gas

2.51 moles of a gas occupies 50.88 liters, and its density is 1.43 g/L at a particular temperature and pressure. Calculate the molar mass of the gas.

  How many grams of water should be produced

How many grams of water should be produced and What is the theoretical yield of nitrogen?

  Evaluate the overall energy change in kilojoules

Calculate the overall energy change in kilojoules per mole for the formation of CaCL(s) from the elements. The following data are needed: (a) Eea for CL(g) = -348.6kj/mol. (b) Ei1 for Ca(g) = +589.8kj/mol. (c) Ei2 for Ca(g) = +1145kj/mol.

  Explain cations while leaving the other cation in solution

Consider a solution that is 1.1*10^-2 M in Ba2+ and 2.0*10^-2 M in Ca2+. A - If sodium sulfate is used to selectively precipitate one of the cations while leaving the other cation in solution, which cation will precipitate first? Ba2+ precipitates..

  How much energy would be needed

If it takes 52 J of energy to warm 7.40g of water by 17°C, how much energy would be needed to warm 7.40g of water by 55 °C

  What will be the equilibrium concentration of co

what will be the equilibrium concentration of CO.

  Most organic polymers are named based on the monomers used

most organic polymers are named based on the monomers used in their production. however polyvinyl alcohol pva is not

  Heat the solution to a gentle boil as well maintain the heat

Heat the solution to a gentle boil and maintain the heat for 1 minute to remove dissolved carbon dioxide. Add 4-8 drops of bromophenol blue indicator, which is yellow in acidic solution and blue in basic solution. If the solution is blue, pipet an..

  Which of the following is the strongest reducing agent

Which of the following is the strongest reducing agent? A. Cu+ (aq) B. Cu (s) C. Fe2+ (aq) D. H2 (g) E. Br2 (l)?  The answer is H2. Why?

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd